although it is true that doctors don't get it always right it is also true that they are equipped, better than anyone else, to cure and care for people. Asthma is a illness that can be caused by many different causes indeed and it would require some tests to establish what exactly causes the asthmatic response to determine its therapy. Of course every single medical case has examples of other cases (similar or not) where some doctor somewhere got it wrong and every doctor(like every other professional) everywhere can **** it up.
I will give a painful example. My father had terminal lung cancer , along with a long list of other diseases , ( the first doctor who established his cancer had said that his father had had the same disease and that he suggested, at that stage and in the condition my father was in to not attempt any therapy because it was just pointless and would have only protracted my father 's agony and he was right) his left lung will fill with fluid (which had to be extracted periodically) and he was on oxygen to help him breathe . Anyway one day, towards the end,actually the day before he died, we find my father had developed an uncontrollable tremor (my father had also Parkinson's disease) we were in the summer holidays and was difficult to find his doctor so another doctor is called, a friend of my brother, he comes and diagnoses my father as to suffer from a loss of electrolytes , we didn't really trust his explanation and diagnosis and called his normal doctor who had to come from his holiday location when he entered the room he said that my father was clearly suffering from Hypoxemia due to the fact that the fluid had filled almost completely his lungs.
So, obviously, the doctor who had diagnosed a lack of electrolytes was wrong and I was very angry at him, but on the other hand I am not a doctor and he is a qualified and successful professional who does many diagnoses everyday and might have not been familiar with that kind of pathology.
Does that mean that I have reduced faith in the medical profession? Not at all, I just got , yet another proof that doctors are fallible but I knew that already.
There is very little doubt that if a doctor tells you that you show Asthmatic symptoms that you have those, they are a symptom , which means an external indication of something out of the ordinary, not the disease itself. I assume that he or she tested you with a spirometer which will give him or her the first indication to assume that you have a condition that affects your lungs.
But in order to have confirmation of your condition and especially to assess the causes of it you would need to conduct other tests which include an allergy test and an X-ray test.
All the tests help the doctor forming a diagnosis by a process of detection and elimination and ultimately you can always ask another doctor for a second opinion.
Some people though just refuse medical diagnosis. I have diabetes type II , that gives me many problems . A friend of mine always tell me that his father also suffered diabetes but , at a certain point of his life he encountered a healer, this healer told him that he didn't need the medicines and that by appropriate macrobiotic diet and his help as an healer (by subjecting himself to regular " impositions (of the healer's) hands" ) he would have lived diabetes free.
Anyway so he did, after a while he went to see his regular doctor who said that his blood tests were ok (this is a sort of a miracle I must admit!) and he told the doctor that he wasn't using any medicines anymore. The doctor was horrified and said,: " You must resume therapy at once , if you don't you are putting yourself in risk of death " he left the doctor and carried on his new regime, without any medicines, life looked much better, my friend always says that his father was " cured" .......but I say, because I know, that few months after the doctor's prediction my friend's father, as predicted, died .......maybe he died happier because of not using the medicines anymore but he died nonetheless.
Trust your doctors, if you are not convinced, ask a second opinion but do not refuse a diagnosis outright because you don't think so, they generally know better.